Page 127 of 280

Information on “T” type tires
“T” type tires have some additional
information beyond those of “P”
type tires; these differences are
described below:
T145/80D16 is an example of a tire
size.
Note:The temporary tire size for
your vehicle may be different from
this example.
1. T:Indicates a type of tire,
designated by the Tire and Rim
Association (T&RA), that is
intended for temporary service
on cars, SUVs, minivans and
light trucks.
2. 145: Indicates the nominal
width of the tire in millimeters
from sidewall edge to sidewall edge. In general, the larger the
number, the wider the tire.
3. 80: Indicates the aspect ratio which gives the tire’s ratio of height to
width. Numbers of 70 or lower indicate a short sidewall.
4. D: Indicates a “diagonal” type tire.
R: Indicates a “radial” type tire.
5. 16: Indicates the wheel or rim diameter in inches. If you change
your wheel size, you will have to purchase new tires to match the
new wheel diameter.
Location of the tire label
You will find a Tire Label containing tire inflation pressure by tire size
and other important information located on the B-Pillar or the edge of
the driver’s door. Refer to the payload description and graphic in the
Vehicle loading — with and without a trailer section.
2007 B-Series(mbs)
Owners Guide (post-2002-fmt)
USA (fus)
Tires, Wheels and Loading
127
Page 128 of 280

TIRE PRESSURE MONITORING SYSTEM (TPMS)
Each tire, including the spare (if
provided), should be checked
monthly when cold and inflated to
the inflation pressure recommended
by the vehicle manufacturer on the
vehicle placard or tire inflation pressure label. (If your vehicle has tires
of a different size than the size indicated on the vehicle placard or tire
inflation pressure label, you should determine the proper tire inflation
pressure for those tires.)
As an added safety feature, your vehicle has been equipped with a tire
pressure monitoring system (TPMS) that illuminates a low tire pressure
telltale when one or more of your tires is significantly under-inflated.
Accordingly, when the low tire pressure telltale illuminates, you should
stop and check your tires as soon as possible, and inflate them to the
proper pressure. Driving on a significantly under-inflated tire causes the
tire to overheat and can lead to tire failure. Under-inflation also reduces
fuel efficiency and tire tread life, and may affect the vehicle’s handling
and stopping ability.
Please note that the TPMS is not a substitute for proper tire
maintenance, and it is the driver’s responsibility to maintain correct tire
pressure, even if under-inflation has not reached the level to trigger
illumination of the TPMS low tire pressure telltale.
The Tire Pressure Monitoring System complies with part 15 of the FCC
rules and with RSS-210 of Industry Canada. Operation is subject to the
following two conditions: (1) This device may not cause harmful
interference, and (2) This device must accept any interference received,
including interference that may cause undesired operation.WARNING: The Tire Pressure Monitoring System is NOT a
substitute for manually checking tire pressure. The tire
pressure should be checked periodically (at least monthly)
using a tire gauge, see Inflating your tiresin this chapter.
Failure to properly maintain your tire pressure could increase
the risk of tire failure, loss of control, vehicle rollover and
personal injury.
2007 B-Series (mbs)
Owners Guide (post-2002-fmt)
USA (fus)
Tires, Wheels and Loading
128
Page 130 of 280

When you believe your system is not operating properly
The main function of the Tire Pressure Monitoring System is to warn you
when your tires need air. It can also warn you in the event the system is
no longer capable of functioning as intended. Please refer to the
following chart for information concerning your Tire Pressure Monitoring
System:
Low Tire Pressure
Warning LightPossible cause Customer Action Required
Solid Warning Light Tire(s) under-inflated1. Check your tire pressure to
ensure tires are properly
inflated; refer to
Inflating your
tires in this chapter.
2. After inflating your tires to
the manufacturer’s
recommended inflation pressure
as shown on the Tire Label
(located on the edge of driver’s
door or the B-Pillar) the vehicle
must be driven for at least two
minutes over 20 mph (32 km/h)
before the light will turn OFF.
Spare tire in
use Your temporary spare tire is in
use. Repair the damaged road
wheel/tire and reinstall it on the
vehicle to restore system
functionality. For a description
on how the system functions,
refer to
When your temporary
spare tire is installed in this
section.
TPMS
malfunction If your tires are properly
inflated and your spare tire is
not in use and the light remains
ON, have the system inspected
by your authorized dealer.
2007 B-Series
(mbs)
Owners Guide (post-2002-fmt)
USA (fus)
Tires, Wheels and Loading
130
Page 131 of 280

Low Tire Pressure
Warning LightPossible cause Customer Action Required
Flashing Warning
Light Spare tire in
useYour temporary spare tire is in
use. Repair the damaged road
wheel and re-mount it on the
vehicle to restore system
functionality. For a description
of how the system functions
under these conditions, refer to
When your temporary spare
tire is intalled
in this section.
TPMS
malfunction If your tires are properly
inflated and your spare tire is
not in use and the TPMS
warning light is still ON, have
the system inspected by your
authorized dealer.
When inflating your tires
When putting air into your tires (such as at a gas station or in your
garage), the Tire Pressure Monitoring System may not respond
immediately to the air added to your tires.
It may take up to two minutes of driving over 20 mph (32 km/h) for the
light to turn OFF after you have filled your tires to the recommended
tire pressure.
How temperature affects your tire pressure
The Tire Pressure Monitoring System (TPMS) monitors tire pressure in
each pneumatic tire. While driving in a normal manner, a typical passenger
tire inflation pressure may increase approximately 2 to 4 psi (14 to 28
kPa) from a cold start situation. If the vehicle is stationary over night with
the outside temperature significantly lower than the daytime temperature,
the tire pressure may decrease approximately 3 psi (20.7 kPa) for a drop
of 30° F (16.6° C) in ambient temperature. This lower pressure value may
be detected by the TPMS as being lower than the recommended inflation
pressure and activate the TPMS warning for low tire pressure. If the low
tire pressure warning light is ON, visually check each tire to verify that no
tire is flat. If one or more tires are flat, repair as necessary. Check air
pressure in the road tires. If any tire is underinflated, carefully drive the
vehicle to the nearest location where air can be added to the tires. Inflate
all the tires to the recommended inflation pressure.
2007 B-Series (mbs)
Owners Guide (post-2002-fmt)
USA (fus)
Tires, Wheels and Loading
131